Cumulative distribution of orbital periods of the outer orbits in triples including Cepheids. We show separately the distribution for all Cepheids in triples in clusters and field combined (yellow lines), only in field (black lines), the Cepheids originating from more massive clusters (cyan), and the Cepheids originating from lower mass clusters (magenta). The distribution is normalised to the total number of triples N_3,tot in each group.